Slightly off-topic, but I have to ask: I never heard of using a handheld spectroscope to observe a fluorescence spectrum. In which cases would that be useful (and at which uv wavelength)?
I am curious about that as well, but given the natire of the kit it is likely just a mistake on their end, and a normal uv light. I hate to say it but the kit seems kins of expensive for what you get. You could likely source each component on eBay new and spend less, and you really would want to get a refractometer.
Slightly off-topic, but I have to ask: I never heard of using a handheld spectroscope to observe a fluorescence spectrum. In which cases would that be useful (and at which uv wavelength)?
There was one made by R&J Beck in the 50’s (the earliest catalogue I have was dated at 1952). It’s called Ultra Violet Spectroscope No. 2435/2438 (2435 is a fixed slit and discontinued in the catalogue in 1957).The fluorescence spectrum from a gemstone is too weak for this spectroscope to pick up. But if you want to test your LWUV/ SWUV lights, it can give you a quick and pretty accurate answer.
I bought one of these on ebay as I use UV (but not for gemmology, yet). It is a beautifully made instrument and after this suggestion I will see if it is of value in gem ID.
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